/* ************************************************************************
 * Copyright 2020 Advanced Micro Devices, Inc.
 * ************************************************************************ */
#include "bytes.hpp"
#include "cblas_interface.hpp"
#include "flops.hpp"
#include "near.hpp"
#include "norm.hpp"
#include "rocblas.hpp"
#include "rocblas_datatype2string.hpp"
#include "rocblas_init.hpp"
#include "rocblas_math.hpp"
#include "rocblas_random.hpp"
#include "rocblas_test.hpp"
#include "rocblas_vector.hpp"
#include "unit.hpp"
#include "utility.hpp"

//
// herkx_strided_batched when TWOK = false
//

template <typename T, bool TWOK = true>
void testing_her2k_strided_batched_bad_arg(const Arguments& arg)
{
    auto rocblas_herXX_strided_batched_fn
        = TWOK ? rocblas_her2k_strided_batched<T> : rocblas_herkx_strided_batched<T>;

    rocblas_local_handle    handle;
    const rocblas_fill      uplo   = rocblas_fill_upper;
    const rocblas_operation transA = rocblas_operation_none;
    const rocblas_int       N      = 100;
    const rocblas_int       K      = 100;
    const rocblas_int       lda    = 100;
    const rocblas_int       ldb    = 100;
    const rocblas_int       ldc    = 100;
    const T                 alpha  = 1.0;
    using U                        = real_t<T>;
    const U        beta            = 1.0;
    rocblas_stride strideA         = 1;
    rocblas_stride strideB         = 1;
    rocblas_stride strideC         = 1;
    rocblas_int    batch_count     = 2;

    const size_t safe_size = 100;

    // allocate memory on device
    device_vector<T> dA(safe_size);
    device_vector<T> dB(safe_size);
    device_vector<T> dC(safe_size);
    CHECK_DEVICE_ALLOCATION(dA.memcheck());
    CHECK_DEVICE_ALLOCATION(dB.memcheck());
    CHECK_DEVICE_ALLOCATION(dC.memcheck());

    EXPECT_ROCBLAS_STATUS(rocblas_herXX_strided_batched_fn(nullptr,
                                                           uplo,
                                                           transA,
                                                           N,
                                                           K,
                                                           &alpha,
                                                           dA,
                                                           lda,
                                                           strideA,
                                                           dB,
                                                           ldb,
                                                           strideB,
                                                           &beta,
                                                           dC,
                                                           ldc,
                                                           strideC,
                                                           batch_count),
                          rocblas_status_invalid_handle);

    EXPECT_ROCBLAS_STATUS(rocblas_herXX_strided_batched_fn(handle,
                                                           rocblas_fill_full,
                                                           transA,
                                                           N,
                                                           K,
                                                           &alpha,
                                                           dA,
                                                           lda,
                                                           strideA,
                                                           dB,
                                                           ldb,
                                                           strideB,
                                                           &beta,
                                                           dC,
                                                           ldc,
                                                           strideC,
                                                           batch_count),
                          rocblas_status_invalid_value);

    EXPECT_ROCBLAS_STATUS(rocblas_herXX_strided_batched_fn(handle,
                                                           uplo,
                                                           rocblas_operation_transpose,
                                                           N,
                                                           K,
                                                           &alpha,
                                                           dA,
                                                           lda,
                                                           strideA,
                                                           dB,
                                                           ldb,
                                                           strideB,
                                                           &beta,
                                                           dC,
                                                           ldc,
                                                           strideC,
                                                           batch_count),
                          rocblas_status_invalid_value);

    EXPECT_ROCBLAS_STATUS(rocblas_herXX_strided_batched_fn(handle,
                                                           uplo,
                                                           transA,
                                                           N,
                                                           K,
                                                           nullptr,
                                                           dA,
                                                           lda,
                                                           strideA,
                                                           dB,
                                                           ldb,
                                                           strideB,
                                                           &beta,
                                                           dC,
                                                           ldc,
                                                           strideC,
                                                           batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_herXX_strided_batched_fn(handle,
                                                           uplo,
                                                           transA,
                                                           N,
                                                           K,
                                                           &alpha,
                                                           nullptr,
                                                           lda,
                                                           strideA,
                                                           dB,
                                                           ldb,
                                                           strideB,
                                                           &beta,
                                                           dC,
                                                           ldc,
                                                           strideC,
                                                           batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_herXX_strided_batched_fn(handle,
                                                           uplo,
                                                           transA,
                                                           N,
                                                           K,
                                                           &alpha,
                                                           dA,
                                                           lda,
                                                           strideA,
                                                           nullptr,
                                                           ldb,
                                                           strideB,
                                                           &beta,
                                                           dC,
                                                           ldc,
                                                           strideC,
                                                           batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_herXX_strided_batched_fn(handle,
                                                           uplo,
                                                           transA,
                                                           N,
                                                           K,
                                                           &alpha,
                                                           dA,
                                                           lda,
                                                           strideA,
                                                           dB,
                                                           ldb,
                                                           strideB,
                                                           nullptr,
                                                           dC,
                                                           ldc,
                                                           strideC,
                                                           batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_herXX_strided_batched_fn(handle,
                                                           uplo,
                                                           transA,
                                                           N,
                                                           K,
                                                           &alpha,
                                                           dA,
                                                           lda,
                                                           strideA,
                                                           dB,
                                                           ldb,
                                                           strideB,
                                                           &beta,
                                                           nullptr,
                                                           ldc,
                                                           strideC,
                                                           batch_count),
                          rocblas_status_invalid_pointer);

    // quick return with invalid pointers
    EXPECT_ROCBLAS_STATUS(rocblas_herXX_strided_batched_fn(handle,
                                                           uplo,
                                                           transA,
                                                           0,
                                                           K,
                                                           nullptr,
                                                           nullptr,
                                                           lda,
                                                           strideA,
                                                           nullptr,
                                                           ldb,
                                                           strideB,
                                                           nullptr,
                                                           nullptr,
                                                           ldc,
                                                           strideC,
                                                           batch_count),
                          rocblas_status_success);
}

template <typename T, bool TWOK = true>
void testing_her2k_strided_batched(const Arguments& arg)
{
    auto rocblas_herXX_strided_batched_fn
        = TWOK ? rocblas_her2k_strided_batched<T> : rocblas_herkx_strided_batched<T>;
    auto herXX_gflop_count_fn = TWOK ? her2k_gflop_count<T> : herkx_gflop_count<T>;
    auto herXX_ref_fn         = TWOK ? cblas_her2k<T> : cblas_herkx<T>;

    rocblas_local_handle handle;
    rocblas_fill         uplo   = char2rocblas_fill(arg.uplo);
    rocblas_operation    transA = char2rocblas_operation(arg.transA);
    rocblas_int          N      = arg.N;
    rocblas_int          K      = arg.K;
    rocblas_int          lda    = arg.lda;
    rocblas_int          ldb    = arg.ldb;
    rocblas_int          ldc    = arg.ldc;
    T                    alpha  = arg.get_alpha<T>();
    using U                     = real_t<T>;
    U              beta         = arg.get_beta<U>();
    rocblas_stride strideA      = arg.stride_a;
    rocblas_stride strideB      = arg.stride_b;
    rocblas_stride strideC      = arg.stride_c;
    rocblas_int    batch_count  = arg.batch_count;

    double gpu_time_used, cpu_time_used;
    double rocblas_gflops, cblas_gflops;
    double rocblas_error = 0.0;

    // Note: K==0 is not an early exit, since C still needs to be multiplied by beta
    bool invalidSize = batch_count < 0 || N < 0 || K < 0 || ldc < N
                       || (transA == rocblas_operation_none && (lda < N || ldb < N))
                       || (transA != rocblas_operation_none && (lda < K || ldb < K));
    if(N == 0 || batch_count == 0 || invalidSize)
    {
        // ensure invalid sizes checked before pointer check
        EXPECT_ROCBLAS_STATUS(rocblas_herXX_strided_batched_fn(handle,
                                                               uplo,
                                                               transA,
                                                               N,
                                                               K,
                                                               nullptr,
                                                               nullptr,
                                                               lda,
                                                               strideA,
                                                               nullptr,
                                                               ldb,
                                                               strideB,
                                                               nullptr,
                                                               nullptr,
                                                               ldc,
                                                               strideC,
                                                               batch_count),
                              invalidSize ? rocblas_status_invalid_size : rocblas_status_success);

        return;
    }

    size_t cols = (transA == rocblas_operation_none ? std::max(K, 1) : N);
    size_t rows = (transA != rocblas_operation_none ? std::max(K, 1) : N);
    strideA     = std::max(strideA, rocblas_stride(lda * cols));
    strideB     = std::max(strideB, rocblas_stride(ldb * cols));
    strideC     = std::max(strideC, rocblas_stride(size_t(ldc) * N));

    size_t size_A = strideA * batch_count;
    size_t size_B = strideB * batch_count;
    size_t size_C = strideC * batch_count;

    // allocate memory on device
    device_vector<T> dA(size_A);
    device_vector<T> dB(size_B);
    device_vector<T> dC(size_C);
    device_vector<T> d_alpha(1);
    device_vector<U> d_beta(1);
    CHECK_DEVICE_ALLOCATION(dA.memcheck());
    CHECK_DEVICE_ALLOCATION(dB.memcheck());
    CHECK_DEVICE_ALLOCATION(dC.memcheck());
    CHECK_DEVICE_ALLOCATION(d_alpha.memcheck());
    CHECK_DEVICE_ALLOCATION(d_beta.memcheck());

    // Naming: dX is in GPU (device) memory. hK is in CPU (host) memory
    host_vector<T> h_alpha(1);
    host_vector<U> h_beta(1);
    host_vector<T> hA(size_A);
    host_vector<T> hB(size_B);
    host_vector<T> hC_1(size_C);
    host_vector<T> hC_2(size_C);
    host_vector<T> hC_gold(size_C);
    CHECK_HIP_ERROR(h_alpha.memcheck());
    CHECK_HIP_ERROR(h_beta.memcheck());
    CHECK_HIP_ERROR(hA.memcheck());
    CHECK_HIP_ERROR(hB.memcheck());
    CHECK_HIP_ERROR(hC_1.memcheck());
    CHECK_HIP_ERROR(hC_2.memcheck());
    CHECK_HIP_ERROR(hC_gold.memcheck());

    // Initial Data on CPU
    h_alpha[0] = alpha;
    h_beta[0]  = beta;
    rocblas_seedrand();
    rocblas_init<T>(hA);
    if(TWOK)
    {
        rocblas_init<T>(hB);
    }
    else
    { // require symmetric A*B^H so testing with B = A
        rocblas_copy_matrix((T*)hA, (T*)hB, rows, cols, lda, ldb, strideA, strideB, batch_count);
    }
    rocblas_init<T>(hC_1);

    hC_2    = hC_1;
    hC_gold = hC_1;

    // copy data from CPU to device
    CHECK_HIP_ERROR(dA.transfer_from(hA));
    CHECK_HIP_ERROR(dB.transfer_from(hB));

    if(arg.unit_check || arg.norm_check)
    {
        // host alpha/beta
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));
        CHECK_HIP_ERROR(dC.transfer_from(hC_1));

        CHECK_ROCBLAS_ERROR(rocblas_herXX_strided_batched_fn(handle,
                                                             uplo,
                                                             transA,
                                                             N,
                                                             K,
                                                             &h_alpha[0],
                                                             dA,
                                                             lda,
                                                             strideA,
                                                             dB,
                                                             ldb,
                                                             strideB,
                                                             &h_beta[0],
                                                             dC,
                                                             ldc,
                                                             strideC,
                                                             batch_count));

        // copy output from device to CPU
        CHECK_HIP_ERROR(hC_1.transfer_from(dC));

        // device alpha/beta
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));
        CHECK_HIP_ERROR(dC.transfer_from(hC_2));
        CHECK_HIP_ERROR(d_alpha.transfer_from(h_alpha));
        CHECK_HIP_ERROR(d_beta.transfer_from(h_beta));

        CHECK_ROCBLAS_ERROR(rocblas_herXX_strided_batched_fn(handle,
                                                             uplo,
                                                             transA,
                                                             N,
                                                             K,
                                                             d_alpha,
                                                             dA,
                                                             lda,
                                                             strideA,
                                                             dB,
                                                             ldb,
                                                             strideB,
                                                             d_beta,
                                                             dC,
                                                             ldc,
                                                             strideC,
                                                             batch_count));

        // copy output from device to CPU
        CHECK_HIP_ERROR(hC_2.transfer_from(dC));

        // CPU BLAS
        if(arg.timing)
        {
            cpu_time_used = get_time_us();
        }

        // cpu reference
        for(int i = 0; i < batch_count; i++)
        {
            // herkx: B equals A to ensure a symmetric result
            herXX_ref_fn(uplo,
                         transA,
                         N,
                         K,
                         &h_alpha[0],
                         hA + i * strideA,
                         lda,
                         hB + i * strideB,
                         ldb,
                         &h_beta[0],
                         hC_gold + i * strideC,
                         ldc);
        }

        if(arg.timing)
        {
            cpu_time_used = get_time_us() - cpu_time_used;
            cblas_gflops  = batch_count * herXX_gflop_count_fn(N, K) / cpu_time_used * 1e6;
        }

        if(arg.unit_check)
        {
            const double tol = K * sum_error_tolerance<T>;
            near_check_general<T>(N, N, batch_count, ldc, strideC, hC_gold, hC_1, tol);
            near_check_general<T>(N, N, batch_count, ldc, strideC, hC_gold, hC_2, tol);
        }

        if(arg.norm_check)
        {
            auto err1 = std::abs(
                norm_check_general<T>('F', N, N, ldc, strideC, batch_count, hC_gold, hC_1));
            auto err2 = std::abs(
                norm_check_general<T>('F', N, N, ldc, strideC, batch_count, hC_gold, hC_2));
            rocblas_error = err1 > err2 ? err1 : err2;
        }
    }

    if(arg.timing)
    {
        int number_cold_calls = 2;
        int number_hot_calls  = arg.iters;

        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));

        for(int i = 0; i < number_cold_calls; i++)
        {
            rocblas_herXX_strided_batched_fn(handle,
                                             uplo,
                                             transA,
                                             N,
                                             K,
                                             h_alpha,
                                             dA,
                                             lda,
                                             strideA,
                                             dB,
                                             ldb,
                                             strideB,
                                             h_beta,
                                             dC,
                                             ldc,
                                             strideC,
                                             batch_count);
        }

        gpu_time_used = get_time_us(); // in microseconds
        for(int i = 0; i < number_hot_calls; i++)
        {
            rocblas_herXX_strided_batched_fn(handle,
                                             uplo,
                                             transA,
                                             N,
                                             K,
                                             h_alpha,
                                             dA,
                                             lda,
                                             strideA,
                                             dB,
                                             ldb,
                                             strideB,
                                             h_beta,
                                             dC,
                                             ldc,
                                             strideC,
                                             batch_count);
        }
        gpu_time_used = get_time_us() - gpu_time_used;
        rocblas_gflops
            = batch_count * herXX_gflop_count_fn(N, K) * number_hot_calls / gpu_time_used * 1e6;

        std::cout << "uplo,transA,N,K,alpha,lda,strideA,ldb,strideB,beta,ldc,strideC,batch_count,"
                     "rocblas-Gflops,us";

        if(arg.norm_check)
            std::cout << ",CPU-Gflops,us,norm-error";

        std::cout << std::endl;

        std::cout << arg.uplo << "," << arg.transA << "," << N << "," << K << ","
                  << arg.get_alpha<T>() << "," << lda << "," << strideA << "," << ldb << ","
                  << strideB << "," << arg.get_beta<U>() << "," << ldc << "," << strideC << ","
                  << batch_count << "," << rocblas_gflops << ","
                  << gpu_time_used / number_hot_calls;

        if(arg.norm_check)
            std::cout << "," << cblas_gflops << "," << cpu_time_used << "," << rocblas_error;

        std::cout << std::endl;
    }
}
